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SF50 INSTALLATION INSTRUCTIONS

1. Voltage Verification

Prior to product installation, verify that the voltage rating of the intended electrical service matches the voltage rating of the unit to be installed. Warning: serious injury or damage can result from installing a product with an improper voltage rating. Contact Current Technology if voltage ratings are not identical. For WYE connected systems, verify neutral-ground bond on secondary side of upstream distribution or service entrance transformer. Warranty void if SF50 is connected to incorrect voltage configuration or if neutral-ground bond is not present in WYE configured systems.

2. Installation Location

To minimize installed system impedance, install SF50 in a location that minimizes electrical wire bends and wiring distance from point of connection.

3. Mounting

Utilizing the mounting feet and hardware supplied with the unit, mount the SF50 securely and rigidly to building surface or structural member. Attach conduit and pull wires as necessary.

4. Electrical Connections

VERIFY THAT POWER IS DE-ENERGIZED ON ELECTRICAL LINES ASSOCIATED WITH INSTALLATION OF THIS UNIT. SF50 units without integral overcurrent protection must be installed in parallel with the electrical distribution system via a fused disconnect switch or circuit breaker. Fuses or circuit breakers rated for 40A or less must be used. Use #8 AWG or larger copper conductor for all connections including neutral and ground connections (no neutral (N) or transient ground (G) in DELTA configurations). Tighten lugs securely to a maximum torque of 27 in-lb. Caution: B phase must be the high leg for high leg DELTA configured products installed on high leg DELTA systems. Contact factory for other voltage configurations not listed on SF50 technical data sheet.

5. Fuse Block-option

SF50 models are available with integral fuse block option. SF50 models with fuse block option may still be installed in parallel with the electrical distribution system via a non-fused disconnect or circuit breaker. Use #8 AWG or larger copper conductor for all connections

including neutral and ground connections (no neutral (N) or transient ground (G) in DELTA configurations). In the event of fuse failure, the SF50 should be tested with the DTS-2 test set to verify operational integrity. Having verified that the unit is within factory specified tolerances, contact factory for replacement fuses.

6. Remote Monitor Contacts Option

SF50 models are available with two sets of form C remote monitor dry contacts which can be connected to building management systems or remote annunciation alarm panels. To wire contacts, locate the output terminals mounted on the dry contact circuit board. Each set of contacts may be wired independently. Each set of form C contacts include common (C), normally open (NO) and normally closed (NC) contacts. For normally open operation under energized conditions, connect the normally open terminal and common terminal to the monitoring input. For normally closed operation during energized conditions, connect the normally closed terminal and common terminal to the monitoring input. Upon loss of power to any or all phases, contacts will change to alarm state.

7. Before energizing SF50

Check all connections to ensure solid electrical connection. Tighten any loose connections to appropriate torque values.

Measure voltage Line-to-Line, Line-to-Neutral, Line-to-Ground and Neutral-to-Ground to ensure that it does not exceed 10% of the nominal rated voltage for the unit. Contact factory if these tolerances are exceeded.

8. Final Instructions

If all voltages are in tolerance, replace the cover of the unit and tighten fastening screws. Apply power to the unit by engaging the appropriate fused disconnect switch or circuit breaker. Illumination of status lights indicates proper function.

9. DTS-2 Test Point

Disconnect wire harness connector between suppression module and diagnostic monitoring located on interior of SF door before testing the unit with the optional DTS-2 Diagnostic Test Set. Reconnect upon completion of testing.

Ask an Engineer if you have any questions regarding this or other Current Technology products.

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For more information about these or any other surge protection products or to speak with one of our sales reps, please contact us.

Tel: 407-380-9200 Fax: 407-380-3911 Email: jwest@psihq.com

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